If the number of ways in which n different things can be distributed books each having 5 copies takig at least 2 copies of each books is 256, then n= (A) 3 (B) 4 (C) 5 (D) none of these

Number of ways in which 12 different things can be distributed in 3 groups, is

The number of ways in which 5 different prizes can be distributed amongst 4 persons if each is entitled to receive at most 4 prizes is:

The number of ways in which 20 one rupee coins can be distributed among 5 people such that each person, gets at least 3 rupees, is

The number of ways in which 20 identical coins be distributed in 4 persons if each person receive at least 2 coins and atmost 5 coins, are

Find the number of ways in which n different prizes can be distributed among m(< n) persons if each is entitled to receive at most n-1 prizes.

If the number of words of 4 letters formed with n different letters of an alphabet such that at least on letter is repeated in the word is 936, then n= (A) 4 (B) 5 (C) 6 (D) none of these

n dice are thrown and the total number of possible outcomes in which at least one die shows 1 is 671, then n= (A) 3 (B) 4 (C) 5 (D) none of these

The total number of ways in which 5 balls of different colours can be distributed among 3 persons so that each person gets at least one ball is

The number of ways in which m+n(nlem+1) different things can be arranged in a row such that no two of the n things may be together, is

Number of ways in which n different prizes can be distributed among m-persons (m lt n) if each is entitled to receive atmost (n-1) prizes is